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Code will never be executed warning in for-loop #3172

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jakirkham opened this issue Oct 8, 2019 · 0 comments

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@jakirkham
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commented Oct 8, 2019

The following code generates a warning for me using Cython 0.29.13 and Python 3.7.3.

def my_for():
    cdef Py_ssize_t i
    cdef int[4] arr
    cdef int[::1] arr_mv = <int[:4:1]>(&arr[0])
    for i in range(4):
        arr_mv[i] = 0
warning: 
      code will never be executed [-Wunreachable-code]
                module = PyImport_ImportModuleLevelObject(
                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
1 warning generated.
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